Forming method of contact seat and closed die specially used for the forming method

Abstract

The invention discloses a forming method for a contact seat and a closed die special for the forming method. The forming method for the contact seat includes the following steps that (1) a rod-shaped pre-forged part is horizontally put between a punch and a die cushion of the die, the top of the outer circumference surface of the pre-forged part faces the bottom surface of the punch, the bottom of the outer circumference surface of the pre-forged part is located on the top surface of the die cushion, the bottom surface of the punch is used for being matched with the top surface of a finished forged part for complementation, and the top surface of the die cushion is used for being matched with the bottom surface of the finished forged parts for complementation; and (2) the punch and the die cushion oppositely forge and press the pre-forged part in the radial direction of the pre-forged part until the pre-forged part is forged and pressed into the finished forged part. During designing of a closed cover die forming technology of the flat type red copper contact seat, according to the structure feature that the length of the contact seat is much larger than the height of the contact seat, the method for forging the rod-shaped pre-forged part in the radial direction for forming is adopted, therefore the forming period of the contact seat is shortened, and the free forging, machining and forming efficiency of the contact seat is improved.

Description

technical field [0001] The invention relates to a forming method of a contact seat and a closed mold specially used in the forming method. Background technique [0002] At present, a flat contact seat made of pure copper used in a vacuum circuit breaker belongs to a special-shaped non-rotating body structure, and the upper and lower sides of the flat plate have flanges of different heights. Such as Figure 1-2 As shown, the standard contact base 8 includes an annular flange 81, a plate body 82, and a cylinder 83 arranged in sequence from top to bottom, wherein the annular flange 81 and the cylinder body 83 are rotary structures, and the plate body 82 is a non-rotary body structure. The plate body 82 is a horizontal plate with a plate thickness of h2, and a circular groove 84 is provided at the center of the top of the plate body 82; the annular flange 81 is located at the edge of the upper end of the circular groove, and the height of the annular flange is h1; the cylinder...

AI Technical Summary

Problems solved by technology

In this forging process of axial upsetting forging, the metal structure on the top of the bar needs to be formed by radial flow, and the flow stroke of the metal structure is relatively large, resulting in a large deformation stroke of the bar during forging and pressing of the contact seat. , which prolongs the cycle of forging processing and reduces work efficiency

Images